Knockout service receptacle



Dec. 16, 1947. I w. R, W'ORKMAN 2,432,848

KNOCK-OUT SERV I CE RECEPTACLE Filed 0015. 26, 1945 Inventor )4444 MM R. VVa/P/mMA/ WWW Patented Dec. 16, 1947 UNITED STATES PATENT OFFICE KNOCKOUT SERVICE RECEPTACLE William R. Workman, Burlingame, Calif.

Application October 26, 1945, Serial No. 624,803

1 Claim.

My invention relates to electrical service outlet receptacles and has for its object to provide a receptacle adapted for rapid and secure connection within a knockout aperture in any outlet box or switch panel.

Another object of this invention is to provide such a receptacle formed of two sections, one with female socket and the other with a reduced extension to fit therein and means for fixedly connecting the sections through a knockout hole.

Another object of my invention is to provide a contact receptacle having a spacer between the contact members thereof.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure 1 is an end elevation of a plug in receptacle,

Figure 2 is a plan view thereof,

Figure 3 is a plan view of one member of the device,

Figure 4 is a diagrammatic view illustrating the method of installation,

Figure 5 is a View taken on the line 55 of Figure 4,

Figure 6 is a view taken on the line 6-6 of Figure 4, and

Figure '7 is a detail of a contact clip.

In the above drawings as well as in the speci fication to follow, the same characters of reference indicate the same parts throughout.

My invention I consists of a service socket, formed in two sections I2 and I3. The section I2 is provided with a reduced body portion I4 adapted to seat in the recess I provided in member I3 of the device. The reduced plug I4 is adapted to be projected through a knockout ap erture I6 in any service box or plate H. An elongated screw I8 is adapted to secure the members I2 and I3 together. The peripheral edge I9 of the member I3 and the annular shoulder 20 of the member I2 acting as clamp jaws upon theopposing surfaces of the member I1, whereby the socket may be firmly secured and held to said member IT. The face 2I of the member I2 is provided with the usual terminal clips 22 and 23, which clips are separated by a cross bar 24, which not only separates the said clips 22 and 23, but is also adapted to receive the end 25 of the screw I8 acting as a nut therefor. A transverse slot 26 is formed in the adjacent surface of the member or section I3 to receive the cross bar 24, while a second cross bar 21 is formed on the outer surface of the member or section 2 I2 for separating the terminal plates 28 and 29 secured by the rivets 33 to the contacts 22 and 23 supported in said section I2.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described my invention, that which I claim as new and desire to procure by Letters Patent is:

An electrical receptacle comprising separate base and top sections adapted to be secured in a knock-out opening of a junction box, said base section being formed with a reduced collar insertable through said kn0ck-out opening and formed with transversely extending and insulating spacing ridges on its opposite surfaces, contacts in said base section, terminal plates on the opposite sides of the insulating and spacing ridge on the outer surface of said base section having electrical connection with said contacts, said top section being formed with a circular recess in its inner end adapted to receive the reduced collar on said base section when disposed in a knock-out opening, said top section being formed with a transversely extending positioning and locking slot adapted to receive and seat the insulating and spacing ridge on the inner end of said base section. said top section being also provided with plug prong receiving slots through Which electrical contact may be made With said contacts when the prongs of a plug connector are inserted therethrough, and a locking screw extending through the top section and threading into said base section for clamping and holding said sections in position Within said knockout opening.

WILLIAM R. WORKMAN.

REFERENCES CITED- The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 840,014 Russell Jan. 1, 1907 845,754 Chase Mar. 5, 1907 

